FAB Defense Glock 42 Magazine Extension .380 ACP 4rd, Black Polymer - FX4210B

This magazine extension is designed for the Glock 42 chambered in .380 ACP and adds 4 rounds to the standard magazine for a total capacity of 10 rounds. The black polymer construction features an ergonomic design with contoured finger indents for secure manipulation and enables a full grip on the handgun when installed.